432 



Remarks. I have been in some doubt about the real systematic positi 

 of the present genus, but have at last arrived at the conclusion that it ought 

 more properly to be referred to the family Anchorabolidce, in spite of the ab- 

 sence of any obvious armature of the body. It is from this character that the 

 generic name here proposed has been derived. Only a single species of this 

 genus has hitherto come under my notice. 





Anaplosoma sordidum, G. 0. Sars, n. sp. 



(Suppl. PI. 49). 



Specific Characters. Female. Body not very slender, and somewhat 

 depressed, sub-linear in form, being of nearly equal width throughout. Integu- 

 ments very thin and fragile. Surface of body smooth, without any distinct processes, 

 either lateral, or dorsal, but clothed with scattered stiff hairs arranged in a sym- 

 metrical manner, 2 pairs of them, attached to the 3rd and 4th segments dorsally, 

 more being conspicuous than the others. Cephalic segment of moderate size, about 

 equalling in length the 2 succeeding segments combined, and transversely trun- 

 cated anteriorly, the frontal edge being even slightly concave in the middle. 

 The 3 succeeding segments with the lateral parts evenly rounded off; 5th seg- 

 ment scarcely smaller than the preceding one. Urosome about the length of the 

 anterior division and having all the segments simple, without lateral expansions, 

 genital segment distinctly subdivided in the middle, last segment unusually large, 

 being fully as long as the 2 preceding segments combined, anal opercle some- 

 what prominent and finely denticulated at the edge. Caudal rami about the 

 length of the anal segment, slightly divergent and of narrow linear form, inner 

 edge finely ciliated in its proximal part; all the setse, 7 in number on each ramus, 

 crowded together on its outermost part, the dorsal one arising from a bulbous 

 base, and having its proximal part somewhat thickened and sharply defined 

 from the distal; principal apical seta about half the length of the body. Eye 

 wholly absent. Anterior antennae very slender and narrow, fully twice as long as 

 the cephalic segment, and composed of 5 well-defined joints, 1st, 3rd and 5th joints 

 of about equal size, 2nd joint comperatively short but broader than the others, 4th joint 

 very small. Posterior antennae with the proximal joint very long and slender, outer 

 ramus replaced by a small bristle arising from a knob-like prominence. Mandi- 

 bular palp with the basal joint rather narrow and about the length of the distal 

 one, exhibiting outside a small lappet tipped with a delicate bristle and appar- 

 ently answering to the outer ramus. Posterior maxillipeds rather stout, with 2 

 remarkably strong plumose setae issuing from the basal joint, propodus oblong 

 in form, with a conspicuous sinus outside near the base, dactylus long and slender. 



